The 6 mm Remington was introduced by Remington Arms Company in 1955 as the .244 Remington. It is based on necking down the .257 Roberts. Originally intended as a Varmint and predator cartridge, the .244 was never factory loaded with bullets over 90 grains and rifles marked .244 Remington have a 1 in 12 inch twist that may not stabilize the heavier 100 and 105 grain bullets. In 1963 Remington renamed the cartridge, calling it the 6 mm Remington. Rifles marked 6mm Remington have a 1 in 9 inch twist and can stabilize all commercially available 6 mm bullets.[1]

The 6 mm Remington has a slight ballistic advantage over the much more popular .243 Winchester due to a slightly larger case capacity. However, there is no discernible difference in real world hunting applications. The longer case neck of the 6mm Remington is considered desirable by handloaders. Noted Alabama deer hunter and marksman Creath Davis is a proponent of this caliber.

The 6 mm Remington is a Delta L problem cartridge, meaning it can present unexpected chambering and/or feeding problems. The Delta L problem article explains this problem in more detail.